Method of manufacturing piano-type hood hinges



April 21, 1931.

GJ KELLOGG METHOD OF MANUFAEJTURING PIANO TYPE HOOD HINGES Filed Feb. 5, 1930 R O T N E v m flamer 6i Kelly z WW W ATTO RN EYS Patented Apr. 21, 1931 UNITED STATES HOMER G. KELLOGG, OF DETROIT, MICHIGAN, ASSIGNOR T MOTOR PRODUCTS COR-- PATENT OFFICE POR-ATION, OF DETROIT, MICHIGAN, A CORPORATION OF NEW YORK METHOD OF MANUFACTURING PIANO-TYPE HOOD HINGES Application filed February 3, 1930.

This invention relates to a method of manufacturing piano-type hood hinges, and has as its principal objects to simplify, render more etficient and improve generally methods of this character.

One of the primary objects of this invention is to eliminate several punch press operations heretofore necessary in the manufacture of hinges of this nature. To this end the invention contemplates a method wherein the hinge parts are formed by a continuous rolling operation as distinguished from the heretofore punch press operation, thus not only making the operation a continuous one, but also more economical. Subsequently, the blank is pierced or notched and cut to length in a single punch press operation and is thereafter bent or curled to final form about the pintle pin.

In practicing the herein described method, the stock is run from the rolling machine directly into the punch press which operates to notch or blank out the strip and to sever the same into lengths. Thus the roll ing machine acts as a feed for the punch press operation and the piece is completed to the point of curling by one operation.

The several objects and advantages of this invention as well as the manner in which the herein method is practiced will be made more apparent as this description proceeds, espe cially when considered in connection with the accompanying drawings, wherein Figure 1 is a fragmentary perspective view of the strip or blank after the rolling operation;

Figure 2 is a similar view showing the strip or blank after the piercing or notching operation;

Figure 3 is a substantially similar view of the blank after the rolling or forming operation,

Figure 4 is a transverse sectional View through a completed hinge including the two companion hinge parts, and

Figure 5 is a diagrammatical view showing the arrangement of the rolling meehanism and punch press.

In accordance with this invention, an endless strip or blank is passed continuously see Figure 2.

Serial No. 425,603.

through a plurality of suitable forming rolls to produce the rolled section shown in Figure 1, these rolls so shaping the strip as to provide a cross section which comprises an intermediate part 11 and two angularly arranged oppositely extending flanges 12 and 13.' This rolling operation is a continuous one and is not only quicker and otherwise more efiicient, but is much cheaper than punch press work. Moreover, the corners 14 may be more accurately and sharply produced by a rolling operation than by a punch press operation with less wear on the forming members. 1

Subsequently the blank is notched or pierced to provide notches or apertures 15, In the same operation the continuous blank is severed to length to provide hinge parts of the desired or required length.

As shown in Figure 5 the rolling machine and the punch press may be arranged in substantially the relative positions shown so that the stock may be run from the rolling machine directly into the punch press where the stock is notched-out and cut to length. Thus the rolling machine acts as a feed for the press operation and the piece is completed to the point of curling by one operation.

Thereafter the blank is shaped or curled to form about a pintle pin 16 to provide pintle pin receiving portions 17 During this bending operation the flanges 12 and 13 are superposed upon one another, or in other words, brought into longitudinal engagement with one another, as best illustrated in Figures 3 and 4. This brings the corners 14 into nested engagement with one another.

18 indicates apertures by means of which the hinge parts are secured to the automobile hood or other part to be connected.

The notches 15, when the hinge part is bent to final shape, provide spaces 19 alternating with the pintle pin receiving parts 17 and adapted for engagement with companion pintle pin receiving parts of the other hinge part, as is well known in this art. The two companion hinge parts are shown in cross section assembled in Figure 4.

The resulting structure produced by the herein described method is mechanically perfect and may be produced much more quickly and economically than has heretofore been ossible.

While t 1e particular sequence of the operations herein outlined have been found to give entirely satisfactory results, the right is reserved to alter the sequence or character of the several operations as may come within the purview of the accompanying claims.

What I claim as my invention is:

1. In the method of forming piano type hinges, those steps which consist in rolling each hinge part from continuous lengths of material to produce a desired cross section, simultaneously perforating and severing the same to length by a stamping operation and bending into final shape.

2. The method of forming hinges which consists in passing a suitable sheet of metal continuously through a plurality of rolls arranged to form from said sheet a plurality of ofiset sections united by a section arranged at an angle thereto, simultaneously perforatin one of said sections and severing said sheet to length, and bending said sheet to produce a tubular pintle receiving portion with said ofi'set sections in longitudinal engagement with one another.

3. In the method of forming piano type hinges, those steps which consist in passing a strip of metal continuously through fornr ing rolls whereby to shape said strip to form an intermediate part and oppositely extending flanges, perforating the intermediate portion of the strip and severing the same to length, and bending the strip to produce a pintle receiving portion with the flanges lying adjacent one another.

4. In the method of forming piano type hinges, those steps which consist in passing a strip of metal continuously through a plurality of forming rolls arranged to produce a cross section comprising an intermediate section and angular lateral flanges, notchingout and cutting such strip to length, and bending said strip to form said intermediate section into a tubular pintle receiving portion.

5. In the method of forming piano type hinges, those steps which consist in passing a strip of metal continuously through a plurality of forming rolls arranged to produce a cross section comprising an intermediate section and angular lateral flanges, and bend ing said strip to bring said flanges into parallel longitudinal engagement and to form said intermediate section into a tubular pintle receiving portion.

6. In the method of forming piano type hinges, those steps which consist in passing a strip of metal continuously through a plurality of forming rolls arranged to produce a cross section comprising an intermediate section and angular lateral flanges, feeding said strip by means of said forming rolls to a notching-out and severing device, notchingout and cutting said strip to length, and bending said strip to form said intermediate section into a tubular pintle receiving portion.

7. In the method of forming piano type hinges, those steps which consist in passing a strip of metal continuously through a lurality of forming rolls arranged to pro uce a cross section comprising an intermediate section and oppositely extending flanges, perforating the intermediate portion of the strip and cutting said strip to length by a punch press operation, and bending said strip by a punch press operation to form said intermediate section into a tubular pintle receiving portion and to bring said flanges into parallel longitudinal engagement.

In testimony whereof I atlix my signature.

HOMER Gr. KELLOGG.

ill.) 

